We have a remote CME site (v.3.3) and a central CCM site (4.1.3sr4d). The sites use an ICT for calls between the two sites. Calls between the two sites are successful. However, if there is a call between the central site and the remote site and the central site (CCM) puts the remote site call on hold, then tries to resume the call, both phones (central and remote) act as if the call is still on hold. After approximately 10 seconds the call is disconnected. I've had an open case with TAC for three weeks now (two different engineers) and they can't give me a solution. According to them the debugs and traces that we have run indicate that the call is clearing normally.
Any help that anyone can provide is greatly appreciated.